Firefighters are urging NSW residents to prepare their homes against the threat of bushfires as about 70 blazes continue to burn across the state.
NSW Rural Fire Service (RFS) spokesman Ben Shepherd told AAP firefighters were trying to get as many under control as possible before conditions turned nasty on Tuesday.
"We're doing what we can to get the majority of these contained prior to the bad fire weather coming through on Tuesday," Mr Shepherd said.
"There is forecast more lightning tonight, so that many prove problematic because it may give us new fires over the next 24 hours.
"We may not have the ability to contain some prior to that real warm, dry, hot weather coming through."
He said there could also be fires that had not been spotted yet, saying the fire situation was "reasonably quiet" across the state.
Blazes were burning near Griffith, Wagga Wagga, Albury and the Snowy Mountains region, he said.
He said extreme fire conditions were predicted in many parts of the state on Tuesday.
He said residents should not to wait until "the last minute" to prepare their properties against bushfire threats.
Total fire bans were currently in place in the southern and northern Riverina, and lower and upper Central West Plains, the RFS said on its website.